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root/cebix/SheepShaver/src/Unix/main_unix.cpp

Comparing SheepShaver/src/Unix/main_unix.cpp (file contents):
Revision 1.13 by gbeauche, 2003-11-03T21:28:25Z vs.
Revision 1.43 by gbeauche, 2004-06-26T15:26:17Z

#	Line 1 | Line 1
1		/*
2		*  main_unix.cpp - Emulation core, Unix implementation
3		*
4	<	*  SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig
4	>	*  SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
5		*
6		*  This program is free software; you can redistribute it and/or modify
7		*  it under the terms of the GNU General Public License as published by
#	Line 65 | Line 65
65		*  ExecutePPC (or any function that might cause a mode switch). The signal
66		*  stack is restored before exiting the SIGUSR2 handler.
67		*
68	+	*  There is apparently another problem when processing signals. In
69	+	*  fullscreen mode, we get quick updates of the mouse position. This
70	+	*  causes an increased number of calls to TriggerInterrupt(). And,
71	+	*  since IRQ_NEST is not fully handled atomically, nested calls to
72	+	*  ppc_interrupt() may cause stack corruption to eventually crash the
73	+	*  emulator.
74	+	*
75	+	*  FIXME:
76	+	*  The current solution is to allocate another signal stack when
77	+	*  processing ppc_interrupt(). However, it may be better to detect
78	+	*  the INTFLAG_ADB case and handle it specifically with some extra mutex?
79	+	*
80		*  TODO:
81		*    check if SIGSEGV handler works for all registers (including FP!)
82		*/
#	Line 109 | Line 121
121		#include "user_strings.h"
122		#include "vm_alloc.h"
123		#include "sigsegv.h"
124	+	#include "thunks.h"
125
126		#define DEBUG 0
127		#include "debug.h"
128
129
130	+	#ifdef USE_SDL
131	+	#include <SDL.h>
132	+	#endif
133	+
134	+	#ifndef USE_SDL_VIDEO
135		#include <X11/Xlib.h>
136	+	#endif
137
138		#ifdef ENABLE_GTK
139		#include <gtk/gtk.h>
#	Line 131 | Line 150
150		#endif
151
152
153	+	// Enable emulation of unaligned lmw/stmw?
154	+	#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1
155	+
156		// Enable Execute68k() safety checks?
157		#define SAFE_EXEC_68K 0
158
#	Line 140 | Line 162
162		// Interrupts in native mode?
163		#define INTERRUPTS_IN_NATIVE_MODE 1
164
165	+	// Number of alternate stacks for signal handlers?
166	+	#define SIG_STACK_COUNT 4
167	+
168
169		// Constants
170		const char ROM_FILE_NAME[] = "ROM";
171		const char ROM_FILE_NAME2[] = "Mac OS ROM";
172
173	<	const uint32 RAM_BASE = 0x20000000;                     // Base address of RAM
173	>	const uintptr RAM_BASE = 0x20000000;            // Base address of RAM
174		const uint32 SIG_STACK_SIZE = 0x10000;          // Size of signal stack
175
176
177		#if !EMULATED_PPC
153	–	// Structure in which registers are saved in a signal handler;
154	–	// sigcontext->regs points to it
155	–	// (see arch/ppc/kernel/signal.c)
156	–	typedef struct {
157	–	uint32 u[4];
158	–	} __attribute((aligned(16))) vector128;
159	–	#include <linux/elf.h>
160	–
178		struct sigregs {
179	<	elf_gregset_t   gp_regs;                                // Identical to pt_regs
180	<	double                  fp_regs[ELF_NFPREG];    // f0..f31 and fpsrc
181	<	//more (uninteresting) stuff following here
179	>	uint32 nip;
180	>	uint32 link;
181	>	uint32 ctr;
182	>	uint32 msr;
183	>	uint32 xer;
184	>	uint32 ccr;
185	>	uint32 gpr[32];
186	>	};
187	>
188	>	#if defined(__linux__)
189	>	#include <sys/ucontext.h>
190	>	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs))
191	>
192	>	struct machine_regs : public pt_regs
193	>	{
194	>	u_long & cr()                           { return pt_regs::ccr; }
195	>	uint32 cr() const                       { return pt_regs::ccr; }
196	>	uint32 lr() const                       { return pt_regs::link; }
197	>	uint32 ctr() const                      { return pt_regs::ctr; }
198	>	uint32 xer() const                      { return pt_regs::xer; }
199	>	uint32 msr() const                      { return pt_regs::msr; }
200	>	uint32 dar() const                      { return pt_regs::dar; }
201	>	u_long & pc()                           { return pt_regs::nip; }
202	>	uint32 pc() const                       { return pt_regs::nip; }
203	>	u_long & gpr(int i)                     { return pt_regs::gpr[i]; }
204	>	uint32 gpr(int i) const         { return pt_regs::gpr[i]; }
205		};
206		#endif
207
208	+	#if defined(__APPLE__) && defined(__MACH__)
209	+	#include <sys/signal.h>
210	+	extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
211	+
212	+	#include <sys/ucontext.h>
213	+	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext))
214	+
215	+	struct machine_regs : public mcontext
216	+	{
217	+	uint32 & cr()                           { return ss.cr; }
218	+	uint32 cr() const                       { return ss.cr; }
219	+	uint32 lr() const                       { return ss.lr; }
220	+	uint32 ctr() const                      { return ss.ctr; }
221	+	uint32 xer() const                      { return ss.xer; }
222	+	uint32 msr() const                      { return ss.srr1; }
223	+	uint32 dar() const                      { return es.dar; }
224	+	uint32 & pc()                           { return ss.srr0; }
225	+	uint32 pc() const                       { return ss.srr0; }
226	+	uint32 & gpr(int i)                     { return (&ss.r0)[i]; }
227	+	uint32 gpr(int i) const         { return (&ss.r0)[i]; }
228	+	};
229	+	#endif
230	+
231	+	static void build_sigregs(sigregs *srp, machine_regs *mrp)
232	+	{
233	+	srp->nip = mrp->pc();
234	+	srp->link = mrp->lr();
235	+	srp->ctr = mrp->ctr();
236	+	srp->msr = mrp->msr();
237	+	srp->xer = mrp->xer();
238	+	srp->ccr = mrp->cr();
239	+	for (int i = 0; i < 32; i++)
240	+	srp->gpr[i] = mrp->gpr(i);
241	+	}
242	+
243	+	static struct sigaltstack sig_stacks[SIG_STACK_COUNT];  // Stacks for signal handlers
244	+	static int sig_stack_id = 0;                                                    // Stack slot currently used
245	+
246	+	static inline void sig_stack_acquire(void)
247	+	{
248	+	if (++sig_stack_id == SIG_STACK_COUNT) {
249	+	printf("FATAL: signal stack overflow\n");
250	+	return;
251	+	}
252	+	sigaltstack(&sig_stacks[sig_stack_id], NULL);
253	+	}
254	+
255	+	static inline void sig_stack_release(void)
256	+	{
257	+	if (--sig_stack_id < 0) {
258	+	printf("FATAL: signal stack underflow\n");
259	+	return;
260	+	}
261	+	sigaltstack(&sig_stacks[sig_stack_id], NULL);
262	+	}
263	+	#endif
264	+
265
266		// Global variables (exported)
267		#if !EMULATED_PPC
#	Line 172 | Line 269 | void *TOC;                             // Small data pointer (r13
269		#endif
270		uint32 RAMBase;                 // Base address of Mac RAM
271		uint32 RAMSize;                 // Size of Mac RAM
175	–	uint32 SheepStack1Base; // SheepShaver first alternate stack base
176	–	uint32 SheepStack2Base; // SheepShaver second alternate stack base
177	–	uint32 SheepThunksBase; // SheepShaver thunks base
272		uint32 KernelDataAddr;  // Address of Kernel Data
273		uint32 BootGlobsAddr;   // Address of BootGlobs structure at top of Mac RAM
274	+	uint32 DRCacheAddr;             // Address of DR Cache
275		uint32 PVR;                             // Theoretical PVR
276		int64 CPUClockSpeed;    // Processor clock speed (Hz)
277		int64 BusClockSpeed;    // Bus clock speed (Hz)
278
279
280		// Global variables
281	+	#ifndef USE_SDL_VIDEO
282		char *x_display_name = NULL;                            // X11 display name
283		Display *x_display = NULL;                                      // X11 display handle
284	+	#ifdef X11_LOCK_TYPE
285	+	X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
286	+	#endif
287	+	#endif
288
289		static int zero_fd = 0;                                         // FD of /dev/zero
190	–	static bool sheep_area_mapped = false;          // Flag: SheepShaver data area mmap()ed
290		static bool lm_area_mapped = false;                     // Flag: Low Memory area mmap()ped
291		static int kernel_area = -1;                            // SHM ID of Kernel Data area
292		static bool rom_area_mapped = false;            // Flag: Mac ROM mmap()ped
293		static bool ram_area_mapped = false;            // Flag: Mac RAM mmap()ped
294	+	static bool dr_cache_area_mapped = false;       // Flag: Mac DR Cache mmap()ped
295	+	static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped
296		static KernelData *kernel_data;                         // Pointer to Kernel Data
297		static EmulatorData *emulator_data;
298
299		static uint8 last_xpram[XPRAM_SIZE];            // Buffer for monitoring XPRAM changes
300
301		static bool nvram_thread_active = false;        // Flag: NVRAM watchdog installed
302	+	static volatile bool nvram_thread_cancel;       // Flag: Cancel NVRAM thread
303		static pthread_t nvram_thread;                          // NVRAM watchdog
304		static bool tick_thread_active = false;         // Flag: MacOS thread installed
305	+	static volatile bool tick_thread_cancel;        // Flag: Cancel 60Hz thread
306		static pthread_t tick_thread;                           // 60Hz thread
307		static pthread_t emul_thread;                           // MacOS thread
308
#	Line 207 | Line 310 | static bool ready_for_signals = false;
310		static int64 num_segv = 0;                                      // Number of handled SEGV signals
311
312		static struct sigaction sigusr2_action;         // Interrupt signal (of emulator thread)
313	<	#if !EMULATED_PPC
313	>	#if EMULATED_PPC
314	>	static uintptr sig_stack = 0;                           // Stack for PowerPC interrupt routine
315	>	#else
316		static struct sigaction sigsegv_action;         // Data access exception signal (of emulator thread)
317		static struct sigaction sigill_action;          // Illegal instruction signal (of emulator thread)
213	–	static void *sig_stack = NULL;                          // Stack for signal handlers
214	–	static void *extra_stack = NULL;                        // Stack for SIGSEGV inside interrupt handler
318		static bool emul_thread_fatal = false;          // Flag: MacOS thread crashed, tick thread shall dump debug output
319		static sigregs sigsegv_regs;                            // Register dump when crashed
320	+	static const char *crash_reason = NULL;         // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
321		#endif
322
323	+	uint32  SheepMem::page_size;                            // Size of a native page
324	+	uintptr SheepMem::zero_page = 0;                        // Address of ro page filled in with zeros
325	+	uintptr SheepMem::base = 0x60000000;            // Address of SheepShaver data
326	+	uintptr SheepMem::top = 0;                                      // Top of SheepShaver data (stack like storage)
327	+
328
329		// Prototypes
330		static void Quit(void);
#	Line 223 | Line 332 | static void *emul_func(void *arg);
332		static void *nvram_func(void *arg);
333		static void *tick_func(void *arg);
334		#if EMULATED_PPC
226	–	static void sigusr2_handler(int sig);
335		extern void emul_ppc(uint32 start);
336		extern void init_emul_ppc(void);
337		extern void exit_emul_ppc(void);
338	+	sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
339		#else
340	<	static void sigusr2_handler(int sig, sigcontext_struct *sc);
341	<	static void sigsegv_handler(int sig, sigcontext_struct *sc);
342	<	static void sigill_handler(int sig, sigcontext_struct *sc);
340	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
341	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
342	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp);
343		#endif
344
345
#	Line 252 | Line 361 | extern void paranoia_check(void);
361
362		#if EMULATED_PPC
363		/*
364	+	*  Return signal stack base
365	+	*/
366	+
367	+	uintptr SignalStackBase(void)
368	+	{
369	+	return sig_stack + SIG_STACK_SIZE;
370	+	}
371	+
372	+
373	+	/*
374		*  Atomic operations
375		*/
376
#	Line 342 | Line 461 | int main(int argc, char **argv)
461		for (int i=1; i<argc; i++) {
462		if (strcmp(argv[i], "--help") == 0) {
463		usage(argv[0]);
464	+	#ifndef USE_SDL_VIDEO
465		} else if (strcmp(argv[i], "--display") == 0) {
466		i++;
467		if (i < argc)
468		x_display_name = strdup(argv[i]);
469	+	#endif
470		} else if (argv[i][0] == '-') {
471		fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
472		usage(argv[0]);
473		}
474		}
475
476	+	#ifdef USE_SDL
477	+	// Initialize SDL system
478	+	int sdl_flags = 0;
479	+	#ifdef USE_SDL_VIDEO
480	+	sdl_flags |= SDL_INIT_VIDEO;
481	+	#endif
482	+	assert(sdl_flags != 0);
483	+	if (SDL_Init(sdl_flags) == -1) {
484	+	char str[256];
485	+	sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
486	+	ErrorAlert(str);
487	+	goto quit;
488	+	}
489	+	atexit(SDL_Quit);
490	+	#endif
491	+
492	+	#ifndef USE_SDL_VIDEO
493		// Open display
494		x_display = XOpenDisplay(x_display_name);
495		if (x_display == NULL) {
#	Line 365 | Line 503 | int main(int argc, char **argv)
503		// Fork out, so we can return from fullscreen mode when things get ugly
504		XF86DGAForkApp(DefaultScreen(x_display));
505		#endif
506	+	#endif
507
508		#ifdef ENABLE_MON
509		// Initialize mon
510		mon_init();
511		#endif
512
513	+	#if !EMULATED_PPC
514	+	// Install SIGSEGV and SIGBUS handlers
515	+	sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
516	+	sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
517	+	sigsegv_action.sa_sigaction = sigsegv_handler;
518	+	sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
519	+	#ifdef HAVE_SIGNAL_SA_RESTORER
520	+	sigsegv_action.sa_restorer = NULL;
521	+	#endif
522	+	if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
523	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
524	+	ErrorAlert(str);
525	+	goto quit;
526	+	}
527	+	if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
528	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
529	+	ErrorAlert(str);
530	+	goto quit;
531	+	}
532	+	#else
533	+	// Install SIGSEGV handler for CPU emulator
534	+	if (!sigsegv_install_handler(sigsegv_handler)) {
535	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
536	+	ErrorAlert(str);
537	+	goto quit;
538	+	}
539	+	#endif
540	+
541	+	// Initialize VM system
542	+	vm_init();
543	+
544		// Get system info
545		PVR = 0x00040000;                       // Default: 604
546		CPUClockSpeed = 100000000;      // Default: 100MHz
547		BusClockSpeed = 100000000;      // Default: 100MHz
548	<	#if !EMULATED_PPC
548	>	#if EMULATED_PPC
549	>	PVR = 0x000c0000;                       // Default: 7400 (with AltiVec)
550	>	#elif defined(__APPLE__) && defined(__MACH__)
551	>	proc_file = popen("ioreg -c IOPlatformDevice", "r");
552	>	if (proc_file) {
553	>	char line[256];
554	>	bool powerpc_node = false;
555	>	while (fgets(line, sizeof(line) - 1, proc_file)) {
556	>	// Read line
557	>	int len = strlen(line);
558	>	if (len == 0)
559	>	continue;
560	>	line[len - 1] = 0;
561	>
562	>	// Parse line
563	>	if (strstr(line, "o PowerPC,"))
564	>	powerpc_node = true;
565	>	else if (powerpc_node) {
566	>	uint32 value;
567	>	char head[256];
568	>	if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2)
569	>	PVR = value;
570	>	else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2)
571	>	CPUClockSpeed = value;
572	>	else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2)
573	>	BusClockSpeed = value;
574	>	else if (strchr(line, '}'))
575	>	powerpc_node = false;
576	>	}
577	>	}
578	>	fclose(proc_file);
579	>	} else {
580	>	sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
581	>	WarningAlert(str);
582	>	}
583	>	#else
584		proc_file = fopen("/proc/cpuinfo", "r");
585		if (proc_file) {
586		char line[256];
#	Line 389 | Line 594 | int main(int argc, char **argv)
594		// Parse line
595		int i;
596		char value[256];
597	<	if (sscanf(line, "cpu : %s", value) == 1) {
597	>	if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) {
598		if (strcmp(value, "601") == 0)
599		PVR = 0x00010000;
600		else if (strcmp(value, "603") == 0)
#	Line 410 | Line 615 | int main(int argc, char **argv)
615		PVR = 0x00320000;
616		else if (strcmp(value, "860") == 0)
617		PVR = 0x00500000;
618	+	else if (strcmp(value, "7400") == 0)
619	+	PVR = 0x000c0000;
620	+	else if (strcmp(value, "7410") == 0)
621	+	PVR = 0x800c0000;
622		else
623		printf("WARNING: Unknown CPU type '%s', assuming 604\n", value);
624		}
#	Line 421 | Line 630 | int main(int argc, char **argv)
630		sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
631		WarningAlert(str);
632		}
633	+
634	+	// Get actual bus frequency
635	+	proc_file = fopen("/proc/device-tree/clock-frequency", "r");
636	+	if (proc_file) {
637	+	union { uint8 b[4]; uint32 l; } value;
638	+	if (fread(value.b, sizeof(value), 1, proc_file) == 1)
639	+	BusClockSpeed = value.l;
640	+	fclose(proc_file);
641	+	}
642		#endif
643		D(bug("PVR: %08x (assumed)\n", PVR));
644
#	Line 445 | Line 663 | int main(int argc, char **argv)
663		goto quit;
664		}
665
666	+	#ifndef PAGEZERO_HACK
667		// Create Low Memory area (0x0000..0x3000)
668		if (vm_acquire_fixed((char *)0, 0x3000) < 0) {
669		sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
#	Line 452 | Line 671 | int main(int argc, char **argv)
671		goto quit;
672		}
673		lm_area_mapped = true;
674	+	#endif
675
676		// Create areas for Kernel Data
677		kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
#	Line 470 | Line 690 | int main(int argc, char **argv)
690		ErrorAlert(str);
691		goto quit;
692		}
693	<	kernel_data = (KernelData *)0x68ffe000;
693	>	kernel_data = (KernelData *)KERNEL_DATA_BASE;
694		emulator_data = &kernel_data->ed;
695	<	KernelDataAddr = (uint32)kernel_data;
695	>	KernelDataAddr = KERNEL_DATA_BASE;
696		D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data));
697
698	+	// Create area for DR Cache
699	+	if (vm_acquire_fixed((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
700	+	sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
701	+	ErrorAlert(str);
702	+	goto quit;
703	+	}
704	+	dr_emulator_area_mapped = true;
705	+	if (vm_acquire_fixed((void *)DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
706	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
707	+	ErrorAlert(str);
708	+	goto quit;
709	+	}
710	+	dr_cache_area_mapped = true;
711	+	#if !EMULATED_PPC
712	+	if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
713	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
714	+	ErrorAlert(str);
715	+	goto quit;
716	+	}
717	+	#endif
718	+	DRCacheAddr = DR_CACHE_BASE;
719	+	D(bug("DR Cache at %p\n", DRCacheAddr));
720	+
721		// Create area for SheepShaver data
722	<	if (vm_acquire_fixed((char *)SHEEP_BASE, SHEEP_SIZE) < 0) {
722	>	if (!SheepMem::Init()) {
723		sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
724		ErrorAlert(str);
725		goto quit;
726		}
484	–	SheepStack1Base = SHEEP_BASE + 0x10000;
485	–	SheepStack2Base = SheepStack1Base + 0x10000;
486	–	SheepThunksBase = SheepStack2Base + 0x1000;
487	–	sheep_area_mapped = true;
727
728		// Create area for Mac ROM
729		if (vm_acquire_fixed((char *)ROM_BASE, ROM_AREA_SIZE) < 0) {
#	Line 492 | Line 731 | int main(int argc, char **argv)
731		ErrorAlert(str);
732		goto quit;
733		}
734	<	#if !EMULATED_PPC || defined(__powerpc__)
734	>	#if !EMULATED_PPC
735		if (vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
736		sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
737		ErrorAlert(str);
#	Line 562 | Line 801 | int main(int argc, char **argv)
801		// Load NVRAM
802		XPRAMInit();
803
804	+	// Load XPRAM default values if signature not found
805	+	if (XPRAM[0x130c] != 0x4e || XPRAM[0x130d] != 0x75
806	+	|| XPRAM[0x130e] != 0x4d || XPRAM[0x130f] != 0x63) {
807	+	D(bug("Loading XPRAM default values\n"));
808	+	memset(XPRAM + 0x1300, 0, 0x100);
809	+	XPRAM[0x130c] = 0x4e;   // "NuMc" signature
810	+	XPRAM[0x130d] = 0x75;
811	+	XPRAM[0x130e] = 0x4d;
812	+	XPRAM[0x130f] = 0x63;
813	+	XPRAM[0x1301] = 0x80;   // InternalWaitFlags = DynWait (don't wait for SCSI devices upon bootup)
814	+	XPRAM[0x1310] = 0xa8;   // Standard PRAM values
815	+	XPRAM[0x1311] = 0x00;
816	+	XPRAM[0x1312] = 0x00;
817	+	XPRAM[0x1313] = 0x22;
818	+	XPRAM[0x1314] = 0xcc;
819	+	XPRAM[0x1315] = 0x0a;
820	+	XPRAM[0x1316] = 0xcc;
821	+	XPRAM[0x1317] = 0x0a;
822	+	XPRAM[0x131c] = 0x00;
823	+	XPRAM[0x131d] = 0x02;
824	+	XPRAM[0x131e] = 0x63;
825	+	XPRAM[0x131f] = 0x00;
826	+	XPRAM[0x1308] = 0x13;
827	+	XPRAM[0x1309] = 0x88;
828	+	XPRAM[0x130a] = 0x00;
829	+	XPRAM[0x130b] = 0xcc;
830	+	XPRAM[0x1376] = 0x00;   // OSDefault = MacOS
831	+	XPRAM[0x1377] = 0x01;
832	+	}
833	+
834		// Set boot volume
835		i16 = PrefsFindInt32("bootdrive");
836		XPRAM[0x1378] = i16 >> 8;
#	Line 579 | Line 848 | int main(int argc, char **argv)
848		boot_globs[1] = htonl(RAMSize);
849		boot_globs[2] = htonl((uint32)-1);                      // End of bank table
850
851	+	// Init thunks
852	+	if (!ThunksInit())
853	+	goto quit;
854	+
855		// Init drivers
856		SonyInit();
857		DiskInit();
#	Line 588 | Line 861 | int main(int argc, char **argv)
861		// Init external file system
862		ExtFSInit();
863
864	+	// Init ADB
865	+	ADBInit();
866	+
867		// Init audio
868		AudioInit();
869
#	Line 622 | Line 898 | int main(int argc, char **argv)
898		// Initialize Kernel Data
899		memset(kernel_data, 0, sizeof(KernelData));
900		if (ROMType == ROMTYPE_NEWWORLD) {
901	<	static uint32 of_dev_tree[4] = {0, 0, 0, 0};
902	<	static uint8 vector_lookup_tbl[128];
903	<	static uint8 vector_mask_tbl[64];
901	>	uintptr of_dev_tree = SheepMem::Reserve(4 * sizeof(uint32));
902	>	memset((void *)of_dev_tree, 0, 4 * sizeof(uint32));
903	>	uintptr vector_lookup_tbl = SheepMem::Reserve(128);
904	>	uintptr vector_mask_tbl = SheepMem::Reserve(64);
905		memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80);
906	<	memset(vector_lookup_tbl, 0, 128);
907	<	memset(vector_mask_tbl, 0, 64);
906	>	memset((void *)vector_lookup_tbl, 0, 128);
907	>	memset((void *)vector_mask_tbl, 0, 64);
908		kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE);
909	<	kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree);        // OF device tree base
910	<	kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl);
911	<	kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl);
909	>	kernel_data->v[0xb84 >> 2] = htonl(of_dev_tree);                        // OF device tree base
910	>	kernel_data->v[0xb90 >> 2] = htonl(vector_lookup_tbl);
911	>	kernel_data->v[0xb94 >> 2] = htonl(vector_mask_tbl);
912		kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE);                           // OpenPIC base
913		kernel_data->v[0xbb0 >> 2] = htonl(0);                                          // ADB base
914		kernel_data->v[0xc20 >> 2] = htonl(RAMSize);
#	Line 644 | Line 921 | int main(int argc, char **argv)
921		kernel_data->v[0xc50 >> 2] = htonl(RAMBase);
922		kernel_data->v[0xc54 >> 2] = htonl(RAMSize);
923		kernel_data->v[0xf60 >> 2] = htonl(PVR);
924	<	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);
925	<	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);
926	<	kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed);
924	>	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
925	>	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
926	>	kernel_data->v[0xf6c >> 2] = htonl(BusClockSpeed / 4);          // timebase-frequency
927		} else {
928		kernel_data->v[0xc80 >> 2] = htonl(RAMSize);
929		kernel_data->v[0xc84 >> 2] = htonl(RAMSize);
#	Line 658 | Line 935 | int main(int argc, char **argv)
935		kernel_data->v[0xcb0 >> 2] = htonl(RAMBase);
936		kernel_data->v[0xcb4 >> 2] = htonl(RAMSize);
937		kernel_data->v[0xf80 >> 2] = htonl(PVR);
938	<	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);
939	<	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);
940	<	kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed);
938	>	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
939	>	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
940	>	kernel_data->v[0xf8c >> 2] = htonl(BusClockSpeed / 4);          // timebase-frequency
941		}
942
943		// Initialize extra low memory
944		D(bug("Initializing Low Memory...\n"));
945		memset(NULL, 0, 0x3000);
946		WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h'));                  // Signature to detect SheepShaver
947	<	WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data);                    // For trap replacement routines
947	>	WriteMacInt32(XLM_KERNEL_DATA, KernelDataAddr);                                 // For trap replacement routines
948		WriteMacInt32(XLM_PVR, PVR);                                                                    // Theoretical PVR
949		WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed);                                    // For DriverServicesLib patch
950		WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN);                // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode)
951	<	#if EMULATED_PPC
952	<	WriteMacInt32(XLM_ETHER_INIT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_INIT));
953	<	WriteMacInt32(XLM_ETHER_TERM, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_TERM));
677	<	WriteMacInt32(XLM_ETHER_OPEN, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_OPEN));
678	<	WriteMacInt32(XLM_ETHER_CLOSE, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_CLOSE));
679	<	WriteMacInt32(XLM_ETHER_WPUT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_WPUT));
680	<	WriteMacInt32(XLM_ETHER_RSRV, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_RSRV));
681	<	WriteMacInt32(XLM_VIDEO_DOIO, POWERPC_NATIVE_OP_FUNC(NATIVE_VIDEO_DO_DRIVER_IO));
682	<	#else
683	<	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                    // TOC pointer of emulator
684	<	WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule);                // DLPI ethernet driver functions
685	<	WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule);
686	<	WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open);
687	<	WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close);
688	<	WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput);
689	<	WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv);
690	<	WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO);
951	>	WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage());                             // Pointer to read-only page with all bits set to 0
952	>	#if !EMULATED_PPC
953	>	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                            // TOC pointer of emulator
954		#endif
955	+	WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT));       // DLPI ethernet driver functions
956	+	WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM));
957	+	WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN));
958	+	WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE));
959	+	WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT));
960	+	WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV));
961	+	WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO));
962		D(bug("Low Memory initialized\n"));
963
964		// Start 60Hz thread
965	+	tick_thread_cancel = false;
966		tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0);
967		D(bug("Tick thread installed (%ld)\n", tick_thread));
968
969		// Start NVRAM watchdog thread
970		memcpy(last_xpram, XPRAM, XPRAM_SIZE);
971	+	nvram_thread_cancel = false;
972		nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0);
973		D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
974
975		#if !EMULATED_PPC
976		// Create and install stacks for signal handlers
977	<	sig_stack = malloc(SIG_STACK_SIZE);
978	<	D(bug("Signal stack at %p\n", sig_stack));
979	<	if (sig_stack == NULL) {
980	<	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
981	<	goto quit;
982	<	}
983	<	extra_stack = malloc(SIG_STACK_SIZE);
984	<	D(bug("Extra stack at %p\n", extra_stack));
985	<	if (extra_stack == NULL) {
986	<	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
987	<	goto quit;
988	<	}
989	<	struct sigaltstack new_stack;
718	<	new_stack.ss_sp = sig_stack;
719	<	new_stack.ss_flags = 0;
720	<	new_stack.ss_size = SIG_STACK_SIZE;
721	<	if (sigaltstack(&new_stack, NULL) < 0) {
977	>	for (int i = 0; i < SIG_STACK_COUNT; i++) {
978	>	void *sig_stack = malloc(SIG_STACK_SIZE);
979	>	D(bug("Signal stack %d at %p\n", i, sig_stack));
980	>	if (sig_stack == NULL) {
981	>	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
982	>	goto quit;
983	>	}
984	>	sig_stacks[i].ss_sp = sig_stack;
985	>	sig_stacks[i].ss_flags = 0;
986	>	sig_stacks[i].ss_size = SIG_STACK_SIZE;
987	>	}
988	>	sig_stack_id = 0;
989	>	if (sigaltstack(&sig_stacks[0], NULL) < 0) {
990		sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
991		ErrorAlert(str);
992		goto quit;
#	Line 726 | Line 994 | int main(int argc, char **argv)
994		#endif
995
996		#if !EMULATED_PPC
729	–	// Install SIGSEGV handler
730	–	sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
731	–	sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
732	–	sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler;
733	–	sigsegv_action.sa_flags = SA_ONSTACK;
734	–	sigsegv_action.sa_restorer = NULL;
735	–	if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
736	–	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
737	–	ErrorAlert(str);
738	–	goto quit;
739	–	}
740	–
997		// Install SIGILL handler
998		sigemptyset(&sigill_action.sa_mask);    // Block interrupts during ILL handling
999		sigaddset(&sigill_action.sa_mask, SIGUSR2);
1000	<	sigill_action.sa_handler = (__sighandler_t)sigill_handler;
1001	<	sigill_action.sa_flags = SA_ONSTACK;
1000	>	sigill_action.sa_sigaction = sigill_handler;
1001	>	sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
1002	>	#ifdef HAVE_SIGNAL_SA_RESTORER
1003		sigill_action.sa_restorer = NULL;
1004	+	#endif
1005		if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
1006		sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
1007		ErrorAlert(str);
#	Line 751 | Line 1009 | int main(int argc, char **argv)
1009		}
1010		#endif
1011
1012	+	#if !EMULATED_PPC
1013		// Install interrupt signal handler
1014		sigemptyset(&sigusr2_action.sa_mask);
1015	<	sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler;
1016	<	sigusr2_action.sa_flags = 0;
1017	<	#if !EMULATED_PPC
759	<	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART;
760	<	#endif
1015	>	sigusr2_action.sa_sigaction = sigusr2_handler;
1016	>	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
1017	>	#ifdef HAVE_SIGNAL_SA_RESTORER
1018		sigusr2_action.sa_restorer = NULL;
1019	+	#endif
1020		if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
1021		sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
1022		ErrorAlert(str);
1023		goto quit;
1024		}
1025	+	#endif
1026
1027		// Get my thread ID and execute MacOS thread function
1028		emul_thread = pthread_self();
#	Line 789 | Line 1048 | static void Quit(void)
1048
1049		// Stop 60Hz thread
1050		if (tick_thread_active) {
1051	+	tick_thread_cancel = true;
1052		pthread_cancel(tick_thread);
1053		pthread_join(tick_thread, NULL);
1054		}
1055
1056		// Stop NVRAM watchdog thread
1057		if (nvram_thread_active) {
1058	+	nvram_thread_cancel = true;
1059		pthread_cancel(nvram_thread);
1060		pthread_join(nvram_thread, NULL);
1061		}
1062
1063		#if !EMULATED_PPC
1064	<	// Uninstall SIGSEGV handler
1064	>	// Uninstall SIGSEGV and SIGBUS handlers
1065		sigemptyset(&sigsegv_action.sa_mask);
1066		sigsegv_action.sa_handler = SIG_DFL;
1067		sigsegv_action.sa_flags = 0;
1068		sigaction(SIGSEGV, &sigsegv_action, NULL);
1069	+	sigaction(SIGBUS, &sigsegv_action, NULL);
1070
1071		// Uninstall SIGILL handler
1072		sigemptyset(&sigill_action.sa_mask);
1073		sigill_action.sa_handler = SIG_DFL;
1074		sigill_action.sa_flags = 0;
1075		sigaction(SIGILL, &sigill_action, NULL);
1076	+
1077	+	// Delete stacks for signal handlers
1078	+	for (int i = 0; i < SIG_STACK_COUNT; i++) {
1079	+	void *sig_stack = sig_stacks[i].ss_sp;
1080	+	if (sig_stack)
1081	+	free(sig_stack);
1082	+	}
1083		#endif
1084
1085		// Save NVRAM
#	Line 831 | Line 1100 | static void Quit(void)
1100		// Exit audio
1101		AudioExit();
1102
1103	+	// Exit ADB
1104	+	ADBExit();
1105	+
1106		// Exit video
1107		VideoExit();
1108
#	Line 843 | Line 1115 | static void Quit(void)
1115		DiskExit();
1116		SonyExit();
1117
1118	+	// Delete thunks
1119	+	ThunksExit();
1120	+
1121	+	// Delete SheepShaver globals
1122	+	SheepMem::Exit();
1123	+
1124		// Delete RAM area
1125		if (ram_area_mapped)
1126		vm_release((char *)RAM_BASE, RAMSize);
#	Line 851 | Line 1129 | static void Quit(void)
1129		if (rom_area_mapped)
1130		vm_release((char *)ROM_BASE, ROM_AREA_SIZE);
1131
1132	+	// Delete DR cache areas
1133	+	if (dr_emulator_area_mapped)
1134	+	vm_release((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
1135	+	if (dr_cache_area_mapped)
1136	+	vm_release((void *)DR_CACHE_BASE, DR_CACHE_SIZE);
1137	+
1138		// Delete Kernel Data area
1139		if (kernel_area >= 0) {
1140		shmdt((void *)KERNEL_DATA_BASE);
#	Line 878 | Line 1162 | static void Quit(void)
1162		#endif
1163
1164		// Close X11 server connection
1165	+	#ifndef USE_SDL_VIDEO
1166		if (x_display)
1167		XCloseDisplay(x_display);
1168	+	#endif
1169
1170		exit(0);
1171		}
#	Line 954 | Line 1240 | void Execute68kTrap(uint16 trap, M68kReg
1240		uint16 proc[2] = {trap, M68K_RTS};
1241		Execute68k((uint32)proc, r);
1242		}
957	–
958	–
959	–	/*
960	–	*  Execute PPC code from EMUL_OP routine (real mode switch)
961	–	*/
962	–
963	–	void ExecutePPC(void (*func)())
964	–	{
965	–	uint32 tvect[2] = {(uint32)func, 0};    // Fake TVECT
966	–	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
967	–	M68kRegisters r;
968	–	Execute68k((uint32)&desc, &r);
969	–	}
1243		#endif
1244
1245
#	Line 1045 | Line 1318 | void MakeExecutable(int dummy, void *sta
1318
1319		void PatchAfterStartup(void)
1320		{
1048	–	#if EMULATED_PPC
1321		ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL);
1050	–	#else
1051	–	ExecutePPC(VideoInstallAccel);
1052	–	#endif
1322		InstallExtFS();
1323		}
1324
#	Line 1058 | Line 1327 | void PatchAfterStartup(void)
1327		*  NVRAM watchdog thread (saves NVRAM every minute)
1328		*/
1329
1330	<	static void *nvram_func(void *arg)
1330	>	static void nvram_watchdog(void)
1331		{
1332	<	struct timespec req = {60, 0};  // 1 minute
1332	>	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1333	>	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1334	>	SaveXPRAM();
1335	>	}
1336	>	}
1337
1338	<	for (;;) {
1339	<	pthread_testcancel();
1340	<	nanosleep(&req, NULL);
1341	<	pthread_testcancel();
1342	<	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1343	<	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1071	<	SaveXPRAM();
1072	<	}
1338	>	static void *nvram_func(void *arg)
1339	>	{
1340	>	while (!nvram_thread_cancel) {
1341	>	for (int i=0; i<60 && !nvram_thread_cancel; i++)
1342	>	Delay_usec(999999);             // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
1343	>	nvram_watchdog();
1344		}
1345		return NULL;
1346		}
#	Line 1082 | Line 1353 | static void *nvram_func(void *arg)
1353		static void *tick_func(void *arg)
1354		{
1355		int tick_counter = 0;
1356	<	struct timespec req = {0, 16625000};
1356	>	uint64 start = GetTicks_usec();
1357	>	int64 ticks = 0;
1358	>	uint64 next = GetTicks_usec();
1359
1360	<	for (;;) {
1360	>	while (!tick_thread_cancel) {
1361
1362		// Wait
1363	<	nanosleep(&req, NULL);
1363	>	next += 16625;
1364	>	int64 delay = next - GetTicks_usec();
1365	>	if (delay > 0)
1366	>	Delay_usec(delay);
1367	>	else if (delay < -16625)
1368	>	next = GetTicks_usec();
1369	>	ticks++;
1370
1371		#if !EMULATED_PPC
1372		// Did we crash?
1373		if (emul_thread_fatal) {
1374
1375		// Yes, dump registers
1376	<	pt_regs *r = (pt_regs *)&sigsegv_regs;
1376	>	sigregs *r = &sigsegv_regs;
1377		char str[256];
1378	<	sprintf(str, "SIGSEGV\n"
1378	>	if (crash_reason == NULL)
1379	>	crash_reason = "SIGSEGV";
1380	>	sprintf(str, "%s\n"
1381		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1382		"  xer %08lx     cr %08lx  \n"
1383		"   r0 %08lx     r1 %08lx     r2 %08lx     r3 %08lx\n"
#	Line 1107 | Line 1388 | static void *tick_func(void *arg)
1388		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1389		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1390		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1391	+	crash_reason,
1392		r->nip, r->link, r->ctr, r->msr,
1393		r->xer, r->ccr,
1394		r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
#	Line 1142 | Line 1424 | static void *tick_func(void *arg)
1424		TriggerInterrupt();
1425		}
1426		}
1427	+
1428	+	uint64 end = GetTicks_usec();
1429	+	D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
1430		return NULL;
1431		}
1432
#	Line 1152 | Line 1437 | static void *tick_func(void *arg)
1437
1438		void Set_pthread_attr(pthread_attr_t *attr, int priority)
1439		{
1440	<	// nothing to do
1440	>	#ifdef HAVE_PTHREADS
1441	>	pthread_attr_init(attr);
1442	>	#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1443	>	// Some of these only work for superuser
1444	>	if (geteuid() == 0) {
1445	>	pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1446	>	pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1447	>	struct sched_param fifo_param;
1448	>	fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1449	>	sched_get_priority_max(SCHED_FIFO)) / 2 +
1450	>	priority);
1451	>	pthread_attr_setschedparam(attr, &fifo_param);
1452	>	}
1453	>	if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1454	>	#ifdef PTHREAD_SCOPE_BOUND_NP
1455	>	// If system scope is not available (eg. we're not running
1456	>	// with CAP_SCHED_MGT capability on an SGI box), try bound
1457	>	// scope.  It exposes pthread scheduling to the kernel,
1458	>	// without setting realtime priority.
1459	>	pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1460	>	#endif
1461	>	}
1462	>	#endif
1463	>	#endif
1464		}
1465
1466
#	Line 1239 | Line 1547 | void B2_delete_mutex(B2_mutex *mutex)
1547		*  Trigger signal USR2 from another thread
1548		*/
1549
1550	<	#if !EMULATED_PPC || ASYNC_IRQ
1550	>	#if !EMULATED_PPC
1551		void TriggerInterrupt(void)
1552		{
1553		if (ready_for_signals)
#	Line 1271 | Line 1579 | void ClearInterruptFlag(uint32 flag)
1579
1580		void DisableInterrupt(void)
1581		{
1582	+	#if EMULATED_PPC
1583	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
1584	+	#else
1585		atomic_add((int *)XLM_IRQ_NEST, 1);
1586	+	#endif
1587		}
1588
1589
#	Line 1281 | Line 1593 | void DisableInterrupt(void)
1593
1594		void EnableInterrupt(void)
1595		{
1596	+	#if EMULATED_PPC
1597	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
1598	+	#else
1599		atomic_add((int *)XLM_IRQ_NEST, -1);
1600	+	#endif
1601		}
1602
1603
#	Line 1289 | Line 1605 | void EnableInterrupt(void)
1605		*  USR2 handler
1606		*/
1607
1608	<	#if EMULATED_PPC
1609	<	static void sigusr2_handler(int sig)
1608	>	#if !EMULATED_PPC
1609	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
1610		{
1611	<	#if ASYNC_IRQ
1612	<	extern void HandleInterrupt(void);
1613	<	HandleInterrupt();
1611	>	machine_regs *r = MACHINE_REGISTERS(scp);
1612	>
1613	>	#ifdef USE_SDL_VIDEO
1614	>	// We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
1615	>	SDL_PumpEvents();
1616		#endif
1299	–	}
1300	–	#else
1301	–	static void sigusr2_handler(int sig, sigcontext_struct *sc)
1302	–	{
1303	–	pt_regs *r = sc->regs;
1617
1618		// Do nothing if interrupts are disabled
1619		if (*(int32 *)XLM_IRQ_NEST > 0)
#	Line 1314 | Line 1627 | static void sigusr2_handler(int sig, sig
1627		case MODE_68K:
1628		// 68k emulator active, trigger 68k interrupt level 1
1629		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1630	<	r->ccr |= ntohl(kernel_data->v[0x674 >> 2]);
1630	>	r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
1631		break;
1632
1633		#if INTERRUPTS_IN_NATIVE_MODE
1634		case MODE_NATIVE:
1635		// 68k emulator inactive, in nanokernel?
1636	<	if (r->gpr[1] != KernelDataAddr) {
1636	>	if (r->gpr(1) != KernelDataAddr) {
1637	>
1638	>	// Set extra stack for nested interrupts
1639	>	sig_stack_acquire();
1640	>
1641		// Prepare for 68k interrupt level 1
1642		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1643		WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
1644
1645		// Execute nanokernel interrupt routine (this will activate the 68k emulator)
1646	<	atomic_add((int32 *)XLM_IRQ_NEST, 1);
1646	>	DisableInterrupt();
1647		if (ROMType == ROMTYPE_NEWWORLD)
1648		ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr);
1649		else
1650		ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr);
1651	+
1652	+	// Reset normal signal stack
1653	+	sig_stack_release();
1654		}
1655		break;
1656		#endif
#	Line 1341 | Line 1661 | static void sigusr2_handler(int sig, sig
1661		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1662
1663		// Set extra stack for SIGSEGV handler
1664	<	struct sigaltstack new_stack;
1345	<	new_stack.ss_sp = extra_stack;
1346	<	new_stack.ss_flags = 0;
1347	<	new_stack.ss_size = SIG_STACK_SIZE;
1348	<	sigaltstack(&new_stack, NULL);
1664	>	sig_stack_acquire();
1665		#if 1
1666		// Execute full 68k interrupt routine
1667		M68kRegisters r;
#	Line 1367 | Line 1683 | static void sigusr2_handler(int sig, sig
1683		if (InterruptFlags & INTFLAG_VIA) {
1684		ClearInterruptFlag(INTFLAG_VIA);
1685		ADBInterrupt();
1686	<	ExecutePPC(VideoVBL);
1686	>	ExecuteNative(NATIVE_VIDEO_VBL);
1687		}
1688		}
1689		#endif
1690		// Reset normal signal stack
1691	<	new_stack.ss_sp = sig_stack;
1376	<	new_stack.ss_flags = 0;
1377	<	new_stack.ss_size = SIG_STACK_SIZE;
1378	<	sigaltstack(&new_stack, NULL);
1691	>	sig_stack_release();
1692		}
1693		break;
1694		#endif
#	Line 1389 | Line 1702 | static void sigusr2_handler(int sig, sig
1702		*/
1703
1704		#if !EMULATED_PPC
1705	<	static void sigsegv_handler(int sig, sigcontext_struct *sc)
1705	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
1706		{
1707	<	pt_regs *r = sc->regs;
1707	>	machine_regs *r = MACHINE_REGISTERS(scp);
1708
1709		// Get effective address
1710	<	uint32 addr = r->dar;
1710	>	uint32 addr = r->dar();
1711
1712		#if ENABLE_VOSF
1713		// Handle screen fault.
1714		extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
1715	<	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->nip))
1715	>	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
1716		return;
1717		#endif
1718
1719		num_segv++;
1720
1721	<	// Fault in Mac ROM or RAM?
1722	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1721	>	// Fault in Mac ROM or RAM or DR Cache?
1722	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize)) || (r->pc() >= DR_CACHE_BASE && r->pc() < (DR_CACHE_BASE + DR_CACHE_SIZE));
1723		if (mac_fault) {
1724
1725		// "VM settings" during MacOS 8 installation
1726	<	if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) {
1727	<	r->nip += 4;
1728	<	r->gpr[8] = 0;
1726	>	if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
1727	>	r->pc() += 4;
1728	>	r->gpr(8) = 0;
1729		return;
1730
1731		// MacOS 8.5 installation
1732	<	} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) {
1733	<	r->nip += 4;
1734	<	r->gpr[8] = 0;
1732	>	} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
1733	>	r->pc() += 4;
1734	>	r->gpr(8) = 0;
1735		return;
1736
1737		// MacOS 8 serial drivers on startup
1738	<	} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 || r->gpr[8] == 0xf3012000)) {
1739	<	r->nip += 4;
1740	<	r->gpr[8] = 0;
1738	>	} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
1739	>	r->pc() += 4;
1740	>	r->gpr(8) = 0;
1741		return;
1742
1743		// MacOS 8.1 serial drivers on startup
1744	<	} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1745	<	r->nip += 4;
1744	>	} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1745	>	r->pc() += 4;
1746		return;
1747	<	} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1748	<	r->nip += 4;
1747	>	} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1748	>	r->pc() += 4;
1749	>	return;
1750	>
1751	>	// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
1752	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) {
1753	>	r->pc() += 4;
1754	>	return;
1755	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1756	>	r->pc() += 4;
1757		return;
1758		}
1759
1760		// Get opcode and divide into fields
1761	<	uint32 opcode = *((uint32 *)r->nip);
1761	>	uint32 opcode = *((uint32 *)r->pc());
1762		uint32 primop = opcode >> 26;
1763		uint32 exop = (opcode >> 1) & 0x3ff;
1764		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1526 | Line 1847 | static void sigsegv_handler(int sig, sig
1847		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1848		case 45:        // sthu
1849		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1850	+	#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
1851	+	case 46:        // lmw
1852	+	if ((addr % 4) != 0) {
1853	+	uint32 ea = addr;
1854	+	D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1855	+	for (int i = rd; i <= 31; i++) {
1856	+	r->gpr(i) = ReadMacInt32(ea);
1857	+	ea += 4;
1858	+	}
1859	+	r->pc() += 4;
1860	+	goto rti;
1861	+	}
1862	+	break;
1863	+	case 47:        // stmw
1864	+	if ((addr % 4) != 0) {
1865	+	uint32 ea = addr;
1866	+	D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1867	+	for (int i = rd; i <= 31; i++) {
1868	+	WriteMacInt32(ea, r->gpr(i));
1869	+	ea += 4;
1870	+	}
1871	+	r->pc() += 4;
1872	+	goto rti;
1873	+	}
1874	+	break;
1875	+	#endif
1876		}
1877
1878	<	// Ignore ROM writes
1879	<	if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
1880	<	//                      D(bug("WARNING: %s write access to ROM at %08lx, pc %08lx\n", transfer_size == SIZE_BYTE ? "Byte" : transfer_size == SIZE_HALFWORD ? "Halfword" : "Word", addr, r->nip));
1878	>	// Ignore ROM writes (including to the zero page, which is read-only)
1879	>	if (transfer_type == TYPE_STORE &&
1880	>	((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) ||
1881	>	(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
1882	>	//                      D(bug("WARNING: %s write access to ROM at %08lx, pc %08lx\n", transfer_size == SIZE_BYTE ? "Byte" : transfer_size == SIZE_HALFWORD ? "Halfword" : "Word", addr, r->pc()));
1883		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1884	<	r->gpr[ra] = addr;
1885	<	r->nip += 4;
1884	>	r->gpr(ra) = addr;
1885	>	r->pc() += 4;
1886		goto rti;
1887		}
1888
1889		// Ignore illegal memory accesses?
1890		if (PrefsFindBool("ignoresegv")) {
1891		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1892	<	r->gpr[ra] = addr;
1892	>	r->gpr(ra) = addr;
1893		if (transfer_type == TYPE_LOAD)
1894	<	r->gpr[rd] = 0;
1895	<	r->nip += 4;
1894	>	r->gpr(rd) = 0;
1895	>	r->pc() += 4;
1896		goto rti;
1897		}
1898
#	Line 1551 | Line 1900 | static void sigsegv_handler(int sig, sig
1900		if (!PrefsFindBool("nogui")) {
1901		char str[256];
1902		if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
1903	<	sprintf(str, GetString(STR_MEM_ACCESS_ERR), transfer_size == SIZE_BYTE ? "byte" : transfer_size == SIZE_HALFWORD ? "halfword" : "word", transfer_type == TYPE_LOAD ? GetString(STR_MEM_ACCESS_READ) : GetString(STR_MEM_ACCESS_WRITE), addr, r->nip, r->gpr[24], r->gpr[1]);
1903	>	sprintf(str, GetString(STR_MEM_ACCESS_ERR), transfer_size == SIZE_BYTE ? "byte" : transfer_size == SIZE_HALFWORD ? "halfword" : "word", transfer_type == TYPE_LOAD ? GetString(STR_MEM_ACCESS_READ) : GetString(STR_MEM_ACCESS_WRITE), addr, r->pc(), r->gpr(24), r->gpr(1));
1904		else
1905	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1905	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1906		ErrorAlert(str);
1907		QuitEmulator();
1908		return;
#	Line 1561 | Line 1910 | static void sigsegv_handler(int sig, sig
1910		}
1911
1912		// For all other errors, jump into debugger (sort of...)
1913	+	crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
1914		if (!ready_for_signals) {
1915	<	printf("SIGSEGV\n");
1916	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1915	>	printf("%s\n");
1916	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1917		printf(
1918		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1919		"  xer %08lx     cr %08lx  \n"
#	Line 1575 | Line 1925 | static void sigsegv_handler(int sig, sig
1925		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1926		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1927		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1928	<	r->nip, r->link, r->ctr, r->msr,
1929	<	r->xer, r->ccr,
1930	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1931	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1932	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1933	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1934	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1935	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1936	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1937	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1928	>	crash_reason,
1929	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1930	>	r->xer(), r->cr(),
1931	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1932	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1933	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1934	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1935	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1936	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1937	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1938	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1939		exit(1);
1940		QuitEmulator();
1941		return;
1942		} else {
1943		// We crashed. Save registers, tell tick thread and loop forever
1944	<	sigsegv_regs = *(sigregs *)r;
1944	>	build_sigregs(&sigsegv_regs, r);
1945		emul_thread_fatal = true;
1946		for (;;) ;
1947		}
#	Line 1602 | Line 1953 | rti:;
1953		*  SIGILL handler
1954		*/
1955
1956	<	static void sigill_handler(int sig, sigcontext_struct *sc)
1956	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp)
1957		{
1958	<	pt_regs *r = sc->regs;
1958	>	machine_regs *r = MACHINE_REGISTERS(scp);
1959		char str[256];
1960
1961		// Fault in Mac ROM or RAM?
1962	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1962	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
1963		if (mac_fault) {
1964
1965		// Get opcode and divide into fields
1966	<	uint32 opcode = *((uint32 *)r->nip);
1966	>	uint32 opcode = *((uint32 *)r->pc());
1967		uint32 primop = opcode >> 26;
1968		uint32 exop = (opcode >> 1) & 0x3ff;
1969		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1623 | Line 1974 | static void sigill_handler(int sig, sigc
1974		switch (primop) {
1975		case 9:         // POWER instructions
1976		case 22:
1977	<	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode);
1977	>	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
1978		ErrorAlert(str);
1979		QuitEmulator();
1980		return;
#	Line 1631 | Line 1982 | power_inst:            sprintf(str, GetString(STR_
1982		case 31:
1983		switch (exop) {
1984		case 83:        // mfmsr
1985	<	r->gpr[rd] = 0xf072;
1986	<	r->nip += 4;
1985	>	r->gpr(rd) = 0xf072;
1986	>	r->pc() += 4;
1987		goto rti;
1988
1989		case 210:       // mtsr
1990		case 242:       // mtsrin
1991		case 306:       // tlbie
1992	<	r->nip += 4;
1992	>	r->pc() += 4;
1993		goto rti;
1994
1995		case 339: {     // mfspr
#	Line 1654 | Line 2005 | power_inst:            sprintf(str, GetString(STR_
2005		case 957:       // PMC3
2006		case 958:       // PMC4
2007		case 959:       // SDA
2008	<	r->nip += 4;
2008	>	r->pc() += 4;
2009		goto rti;
2010		case 25:        // SDR1
2011	<	r->gpr[rd] = 0xdead001f;
2012	<	r->nip += 4;
2011	>	r->gpr(rd) = 0xdead001f;
2012	>	r->pc() += 4;
2013		goto rti;
2014		case 287:       // PVR
2015	<	r->gpr[rd] = PVR;
2016	<	r->nip += 4;
2015	>	r->gpr(rd) = PVR;
2016	>	r->pc() += 4;
2017		goto rti;
2018		}
2019		break;
#	Line 1698 | Line 2049 | power_inst:            sprintf(str, GetString(STR_
2049		case 957:       // PMC3
2050		case 958:       // PMC4
2051		case 959:       // SDA
2052	<	r->nip += 4;
2052	>	r->pc() += 4;
2053		goto rti;
2054		}
2055		break;
#	Line 1717 | Line 2068 | power_inst:            sprintf(str, GetString(STR_
2068
2069		// In GUI mode, show error alert
2070		if (!PrefsFindBool("nogui")) {
2071	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
2071	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
2072		ErrorAlert(str);
2073		QuitEmulator();
2074		return;
#	Line 1725 | Line 2076 | power_inst:            sprintf(str, GetString(STR_
2076		}
2077
2078		// For all other errors, jump into debugger (sort of...)
2079	+	crash_reason = "SIGILL";
2080		if (!ready_for_signals) {
2081	<	printf("SIGILL\n");
2082	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
2081	>	printf("%s\n");
2082	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
2083		printf(
2084		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
2085		"  xer %08lx     cr %08lx  \n"
#	Line 1739 | Line 2091 | power_inst:            sprintf(str, GetString(STR_
2091		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
2092		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
2093		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
2094	<	r->nip, r->link, r->ctr, r->msr,
2095	<	r->xer, r->ccr,
2096	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
2097	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
2098	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
2099	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
2100	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
2101	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
2102	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
2103	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
2094	>	crash_reason,
2095	>	r->pc(), r->lr(), r->ctr(), r->msr(),
2096	>	r->xer(), r->cr(),
2097	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
2098	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
2099	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
2100	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
2101	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
2102	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
2103	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
2104	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
2105		exit(1);
2106		QuitEmulator();
2107		return;
2108		} else {
2109		// We crashed. Save registers, tell tick thread and loop forever
2110	<	sigsegv_regs = *(sigregs *)r;
2110	>	build_sigregs(&sigsegv_regs, r);
2111		emul_thread_fatal = true;
2112		for (;;) ;
2113		}
#	Line 1764 | Line 2117 | rti:;
2117
2118
2119		/*
2120	+	*  Helpers to share 32-bit addressable data with MacOS
2121	+	*/
2122	+
2123	+	bool SheepMem::Init(void)
2124	+	{
2125	+	// Size of a native page
2126	+	page_size = getpagesize();
2127	+
2128	+	// Allocate SheepShaver globals
2129	+	if (vm_acquire_fixed((char *)base, size) < 0)
2130	+	return false;
2131	+
2132	+	// Allocate page with all bits set to 0
2133	+	zero_page = base + size;
2134	+	if (vm_acquire_fixed((char *)zero_page, page_size) < 0)
2135	+	return false;
2136	+	memset((char *)zero_page, 0, page_size);
2137	+	if (vm_protect((char *)zero_page, page_size, VM_PAGE_READ) < 0)
2138	+	return false;
2139	+
2140	+	#if EMULATED_PPC
2141	+	// Allocate alternate stack for PowerPC interrupt routine
2142	+	sig_stack = zero_page + page_size;
2143	+	if (vm_acquire_fixed((char *)sig_stack, SIG_STACK_SIZE) < 0)
2144	+	return false;
2145	+	#endif
2146	+
2147	+	top = base + size;
2148	+	return true;
2149	+	}
2150	+
2151	+	void SheepMem::Exit(void)
2152	+	{
2153	+	if (top) {
2154	+	// Delete SheepShaver globals
2155	+	vm_release((void *)base, size);
2156	+
2157	+	// Delete zero page
2158	+	vm_release((void *)zero_page, page_size);
2159	+
2160	+	#if EMULATED_PPC
2161	+	// Delete alternate stack for PowerPC interrupt routine
2162	+	vm_release((void *)sig_stack, SIG_STACK_SIZE);
2163	+	#endif
2164	+	}
2165	+	}
2166	+
2167	+
2168	+	/*
2169		*  Display alert
2170		*/
2171
#	Line 1812 | Line 2214 | void display_alert(int title_id, int pre
2214
2215		void ErrorAlert(const char *text)
2216		{
2217	<	#ifdef ENABLE_GTK
2217	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2218		if (PrefsFindBool("nogui") || x_display == NULL) {
2219		printf(GetString(STR_SHELL_ERROR_PREFIX), text);
2220		return;
#	Line 1831 | Line 2233 | void ErrorAlert(const char *text)
2233
2234		void WarningAlert(const char *text)
2235		{
2236	<	#ifdef ENABLE_GTK
2236	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2237		if (PrefsFindBool("nogui") || x_display == NULL) {
2238		printf(GetString(STR_SHELL_WARNING_PREFIX), text);
2239		return;

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